streamlit uses stplotly_chart to create line figure

Yes, that's correct. The function st.plotly_chart() can be used to create interactive line figures using the Plotly library. Here's an example code snippet:

import streamlit as st
import plotly.express as px
import pandas as pd

# Load data
df = pd.read_csv("data.csv")

# Create line plot
fig = px.line(df, x="Year", y="Sales", color="Region")

# Display plot using st.plotly_chart()
st.plotly_chart(fig)

In this example, we first load some data from a CSV file using pandas. Then, we use Plotly Express to create a line plot of the sales data over time, with each region shown in a different color. Finally, we display the plot using st.plotly_chart()